SAE International Journal of Commercial Vehicles
A wind tunnel test program was conducted at the Langley Full Scale Tunnel (LFST) to evaluate the performance of five passive drag reduction configurations on a modern straight truck at full scale. Configurations were tested in a build-up fashion with results representing a cumulative effect. Tested configurations include a front valance, a front box fairing, a boat-tail, an ideal side-skirt, and a practical side-skirt. Configurations were evaluated over a nominal 9 degree yaw sweep to establish wind averaged drag coefficients using SAE J1252. Genuine replicate yaw sweeps were used in an uncertainty analysis. Results show up to 28% improvement in wind-averaged drag coefficient and that significant gains can be made in straight truck fuel economy, even at non-highway speeds. © 2011 SAE International.
Original Publication Citation
Landman, D., Cragun, M., McCormick, M., & Wood, R. (2011). Drag reduction of a modern straight truck. SAE International Journal of Commercial Vehicles, 4(1), 256-262. doi:10.4271/2011-01-2283
Landman, Drew; Cragun, Matthew; McCormick, Mike; and Wood, Richard, "Drag Reduction of a Modern Straight Truck" (2011). Mechanical & Aerospace Engineering Faculty Publications. 37.